Honor to increase Snow Storm damage ?
EoE and kill mobs around ?
Smooth Criminal to disable reversal of fortune ? Even if it's luck it seems less about luck than Dshot.
I tried EBSoH with snowstrom oni and q7 dagger and it's not enough. DShot = 20sec deactivation, and that wasn't long enough so smooth criminal won't work.
The lord has only 4 spells so you can disable reversal of fortune twice in a row much more easily than with Dshot and you can use it to gain some energy in other places.
I mean, you disable reversal of fortune for 20s and get Reversal of fortune in your skillbar during this time. 20s later you may use a powerstone and pray again to disable Reversal of fortune again^^
Maybe a useful skill to steal from one mob around ?
Is it possible to put Tranquility somewhere in range, to make RoF expire quicker, or otherwise, if possible, you can use Exhausting assault if you have a lead attack(which I doubt).?
and since RoF gives health gain, maybe predatory season is an option to reduce the healthgain he gets from RoF?
You said 20 sec from smooth criminal isn't enough but besides luck with a pstone, might it be possible to wait for recharge since he won't fully heal in 10 sec will he?
What about Radiation field ? You do nothing but spamming it so you never trigger reversal ( no summoning stone) so the lord is only healed every 8s when he renews reversal ( unless he's spamming it even when it is already active).
Radiation field is approximately equal to permanent 6 health degeneration over the time.
The lord will be healed of 60 every 8s which is a little less than 4 health regeneration. So if the lord do not spam reversal of fortune even when never triggered and if you can handle the energy loss (no zealous weapon can be used) you should be able to kill him this way.